金属涂层 铁或钢上的铜镍铬电镀层 ISO 1457 - 1974

　　This International Standard applies to electroplated coatings of copper plus nickel plus chromium on iron and steel, except for the following :

　　—— coatings applied to machine screw threads (with tolerance);

　　—— coatings applied to sheet, strip or wire in the unfabricated form, or to coil springs;

　　—— coatings applied for other than protective and decorative purposes.